Collapsible core



March 4, 1930.

H. A. DENMIR E COLLAPSIBLE CORE Filed March 5, 1928 2 Sheets-Sheet 1 INVENTOR mm H.Denmire mm A m,

ATTORNEYS March 4, 1930. H. A. DENMIRE' COLLAPSIBLHCORE 2 Sheets-Shoat 2 Filed March 5. 192a INVENTOR Harold RDenmwe fivcm 51 W0 ATTORNEYS Patented M... 4, 1930 I UNITED STATES PATENT orrics HAROL D A. IJIEllNl'll'IIRE, OF AKRON, OHIO, ASSIGNOR TO THE GENERAL TIRE & RUBBER COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO COLLAPSIIBLE CORE Application filed March 5, 1928. Serial N'o. 259,237.

This invention relates to collapsible tire building cores and has for its object to provide a collapsible core from which a tire casing may be easily removed. 1

Collapsible cores are commonly used in the building of pneumatic tire casings and these cores consist of arcuate sections mounted for radial movement on a common supporting shaft. The sections in their outermost posi- 1o tions abut end to end and the core commonly consists of a pair of relatively short key sections and a pair oflonger main sections between which the key sections fit. In order to permit collapse of the main sections, the key 5 sections in machines as heretofore constructed have'bee'n 'mounted'to slide on the shaft so that they maybe collapsed and then drawn outwardly along the supporting shaft to a position clear of the main sections to permit 1 the main sections to be collapsed and, after the collapse of the main sections, the tire is taken off by gradually working it off the main sections and over the key sections positioned between the main sections and the end of the 5 supporting shaft. Considerable labor is involved in the removal of the tire from the core dueto the fact that the tire has to be manipulated to get it over the collapsed key sections. I V w 39 The present invention contemplates the use of a collapsible core structure similar to that heretofore employed but mounted in such a manner that when the core is fully collapsed for the removal of a tire,'the key sections in stead of being positioned upon the outer side of the main core sections are positioned upon theinner side thereof so that the casing may be removed directly from the main core sections and over the end of the supporting shaft.

With the above and other objects in view, the invention may be said to comprise the collapsible tire building core as illustrated in the accompanying drawings hereinafter described and particularly set forth in the appended claims together with such variations and modifications thereof as will be apparent to one skilled in the art to which the invention appertains.

Reference should be had to the accompanying drawings forming a part of the specification in which Figure 1 is a front elevation showing the collapsible core in the receiving position.

Fig. 2 is an axial section through the core.

Fig. 3 is a front elevationshowing the core collapsed with a tire casing thereon.

Fig. 4 is a side elevation showing the core collapsed with a tire casing thereon.

The collapsible core of the present invention is mounted upon the operating shaft 1 of a tire machine which is designated by the numeral 2 in Fig. 2. The tire machine, in so far as the present invention is concerned may be considered merely as a support for the core supporting shaft 1 which projects outwardly therefrom.

The core upon which a tire casing is built consists of a pair of oppositely disposed main sections 3 and 4 and a pair of oppositely disposed key sections 5 and 6 which are considerably shorter than sections 3 and 4 and which are so formed as to be movable into and out of position between the main-sections 3 and 4 when the mainsections are'in their outermost ositions. Key sections 5 and 6 are carried y supporting struts 7, which are connected at their outer ends to the sections 5 and 6 and at their inner ends are slidably mounted in sockets 8, carried by a sleeve 9 keyed to the shaft 1 adjacent the support 2. A handwheel 10 isrotatably mounted on the sleeve 9 and this handwheel is connected through links 11 with the struts 7 so that as the handwheel is turned in one direction, the key sections are simultaneously moved outwardly and when the handwheel is turned in the opposite direction, the key sections are simultaneously retracted to a position clear of the main core sections and of a tire mounted on the core sections. The main sections 3 and 4 are carried by supporting struts 12 which have their inner ends slidably mounted in sockets 13 carried by a sleeve 14 which is keyed to the shaft 1 outwardly of the sleeve 9. The sleeve 14 has rotatably mounted thereon a handwheel 15 which is'connected by links 16 to the struts 12 to shift the main sections inwardly or outwardly with respect to the shaft. In order to position the main sections clear of the key sections, so that they can be collapsed, it is necessary that one of the collapsible supports for the core sections be mounted for movement longitudinally of the shaft 1. As shown herein, the sleeve 14 from which the main sections ot the core are sup.-.v

ported is slidably mounted on: the shaft'l so that by pulling outwardly on the handwheel 15, the main core sections with a tire casing, thereon maybe moved .outwardlytto a position adj acentth'e'outerend of th'ezsha'itt,

the outward movement of the main core sections with the tire thereon positionin'gthe main core sections entirely clear ofthe key sections and 6 so that the main sections may be, collapsed by turning the handwheel E 15.-

When the main sections of;th ezycorerareesocollapsed, the tirewcasing: isrsu pported upon the upper of the main core sections in a-pos-ir tionclosely adjacent the; end of the; shaft where it is convenient-for the; operatomto grasp the tire/casing and strip; itsotE-theimain core section, the ztire casingwbeing; entirely free as soon as itrisdetached tromzthermain; core section. Afterz thetirefcasinglSulQ- moved, the handwheel 15is turned. to move; the mainsections: to their; outermost p-osi tions and the main-section's are'then moved inwardly into alinement with the'key sections :5 and- 6; byzzpushing, on theuhandwheel 15 ,1

whereupon :the keyrsections are moved: :out:

wardly into position between the main'zsec' tionsby turning the: handwheel- 10,- and, the

core. is then ready to havea second-casing; built up thereon.

It will be apparent-that tlie'present invention provides a tirebui'ldin-g core which may be quickly and easily assembled for :reception l of a I tire casing a and which permits: theafine: ishedw I casing to be quickly" and easily re? moved. o

Furthermore,, it is: to be; understood :that 4' the particular form of apparatus shown :and- 9 described, and the; particular procedureseaforth, arepresented for purposes :of explana-z tion and illustration and that rvariousunodd-E fications of said apparatus and procedure. cam I be made: without s departing from my 'inven tion as-defined the appended claims-p llratilclaimo is zy i 1. The, combination with a support; ,odiiaa: shatt' projecting outwardly from said 2 support; and an ,H DHU laIFtlIGCOI'B ,composedof. collapsibly mounted main: and key sections; said. main and keylseotions being in-depends ently mounted: one said shaft and relativelyw movable longitudinally: of the: shaft ate position the; main sections; clear: of the key sec-: tions to permitzcollapseot the main-sections; 7 said: main sections bein supported; on. saidi; shattioutward-lyoi said ey sections. whereby a f the; supported on the main: sections may:

shaft projecting outwardly from said supa port, and an annular tire core composed of collapsibly mounted main and keysections, said mainvand key sections being independently mounted on said shaft andrelativelymovable longitudinally Y of .the.shaft, tosposi tionit-hemai-n sectionsiclear of lth'eekey sections to permit collapse of the main sections,

saidmain sections being slidably supported on said shaft 1'outwardlysofitheiakey; sectionss'.

3;: TllGiCOIIlbi'IlFLblQIli.Wiltbfia support, of a shaft projecting outwardly from said support, anannular tire core comprising a pair of diametrically opposite main sections and a pair of diametrically opposite key sections, means" on said shaft for "supporting the key sections and for 'col-lapsing,- thes sam'en and: means -=-mounted ion -;said. .=shaft outwardly r Qif v said supporting means J foresupporting they main 2 core, sections and; for-- collapsing the slidable;oneaidshaft. I,

4; The combination with a support, otte shaftipnojecting out-wardlyofromsaid sup port, an annular tire core comprising apa r; of dlametrlcally-aopposite mainsect ons andl;

. a pairlof diametricallyppppsite key sections,

a sleeveLkeyed tOySflldi shaft .radiallygmovalolemembers carried by; saidsleeve. and; supports ing said keysections,aisecond;sleeveslidabljex same, thelatter supporting; means being;

keyed to; said ,shaft outwardlyoofthe first mentionedsleeve, radially movableamemlbersi carried "bytthe' second sleeve and supporting said main sections,--and ,handwheelsrrotatabler on, said shaft 7 and connected to, saidsuppgort-rlng members, for zactuating theqsame. I

5.- The combination, with ,a; support,-o:t a

shaft projecting outwardly fromasaid sup,

port, an annular tire corecomprising ,a, pair. of 5 diametrically opposite main. sections, and. a fpairlofdiametrically opposite key sections a sleevev keyedto said shaft, radially mQVr ableamembers carriedby saidsleeve andsup porting said key sections, a secondsleeveslid-l ably keyed to said shaft outwardly vof lthe first mentioned, sleeve,, radially, movable members, vcarried by the second sleeve and supporting-said main,sections;.,and;a hand-a.

wheel rotatably mounted, on;each, of. said}, sleeves and operatively connected to, thexslid v able supporting. memberscarriedthereby for A. actuatingtthesame. I I In testimonywhereotl aflixlmy signature.

HAROLD ALDENMIRE;

be directly removed from said mainsectionsv:

over the outer end of saidshafta 2;;The: combination' jwith'asupport, oat" a? 

